世界数学奥林匹克经典：数论问题

Numbertheoryisanimportantresearchfieldinmathematics.Inmathematicalcompetition，problemsofelementarynumbertheoryoccurfrequently.Thiskindofproblemsuseslittleknowledgeandhaslotsofvariations.Theyareflexibleanddiverse.Inthebookweintroducesomebasicconceptsandmethodsinelementarynumbertheoryviaproblemsinmathematicscompetition.Wehopethatreadersreadthebookwithpaperandpencil，andtrytosolvethembythemselvesbeforetheyreadthesolutionsofexamples.Onlyinthiswaycantheyreallyappreciatethetricksofproblemsolving.